﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Security.Cryptography;
using System.Web.Security;
using System.IO;
namespace FortuneHeavenCommon.ComMethod
{
    public class CommonEncrypt
    {
        private const string KEY_64 = "AbTT0ZI2";
        private const string IV_64 = "kztfq9H3";
        public static string Encrypt(string input)
        {
            return FormsAuthentication.HashPasswordForStoringInConfigFile(input, "MD5");
        }

        public static string ClientEncrypt(string input)
        {
            return FormsAuthentication.HashPasswordForStoringInConfigFile(input, "MD5").ToLower();
        }


        public static string Encode(string data)
        {
            byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
            byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);

            DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
            int i = cryptoProvider.KeySize;
            MemoryStream ms = new MemoryStream();
            CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write);

            StreamWriter sw = new StreamWriter(cst);
            sw.Write(data);
            sw.Flush();
            cst.FlushFinalBlock();
            sw.Flush();
            return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);

        }

        public static string Decode(string data)
        {
            byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
            byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);

            byte[] byEnc;
            try
            {
                byEnc = Convert.FromBase64String(data);
            }
            catch
            {
                return null;
            }

            DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
            MemoryStream ms = new MemoryStream(byEnc);
            CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read);
            StreamReader sr = new StreamReader(cst);
            return sr.ReadToEnd();
        }


        private const int BITS_TO_A_BYTE = 8;
        private const int BYTES_TO_A_WORD = 4;
        private const int BITS_TO_A_WORD = 32;
        private double[] m_lOnBits = new double[30];
        private double[] m_l2Power = new double[30];
        public string EncryptInnerMD5(string input)
        {
            return "";
        }
    }
}